Electricity

Front

What is resistance in an electrical circuit?

Back

Resistance is a measure of the opposition to the flow of electric current, typically measured in ohms.

Front

How does the length of a wire affect its resistance?

Back

Shorter wires have lower resistance than longer wires.

Front

What happens to resistance when the temperature increases?

Back

Higher temperatures generally create higher resistance.

Front

What is the relationship between the thickness of a conductor and its resistance?

Back

Thicker (wider) conductors have lower resistance than thinner conductors.

Front

Which unit is used to measure electric current?

Back

The unit for current is the Ampere (Amp).

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet that is created when electric current flows through a coil of wire, often wrapped around a ferromagnetic core.

Front

How does adding more bulbs in a series circuit affect their brightness?

Back

Adding more bulbs in a series circuit makes the bulbs dimmer.

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). It can be expressed as V = I × R.

Front

What is the difference between series and parallel circuits?

Back

In a series circuit, components are connected end-to-end, so the same current flows through all components. In a parallel circuit, components are connected across common points, so the voltage across each component is the same.

Front

What is the role of a battery in a circuit?

Back

A battery provides the electrical energy needed to push current through the circuit.